51110111106 has 20 divisors (see below), whose sum is σ = 114524508582. Its totient is φ = 17036703648.

The previous prime is 51110111083. The next prime is 51110111119. The reversal of 51110111106 is 60111101115.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 42347466225 + 8762644881 = 205785^2 + 93609^2 .

It is a super-2 number, since 2×51110111106² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 157747095 + ... + 157747418.

Almost surely, 2^51110111106 is an apocalyptic number.

51110111106 is an abundant number, since it is smaller than the sum of its proper divisors (63414397476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51110111106 is a wasteful number, since it uses less digits than its factorization.

51110111106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315494527 (or 315494518 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

Subtracting 51110111106 from its reverse (60111101115), we obtain a palindrome (9000990009).

The spelling of 51110111106 in words is "fifty-one billion, one hundred ten million, one hundred eleven thousand, one hundred six".